Rush for Berlin v1.23 Patch

- Stability issues addressed: at least 4-5 random crashes has been found and corrected.
- Improved Multiplayer: There should be less networking issues when connecting to other players
- Community Single Player maps: Custom maps can now be played (either by themselves or as part of a campaign)
- New units added: The best units from the model creation contest has been inserted into the game
(Ge StugIII, SU T-70, GE VWT166). You can access them via the editor and put them into your own mods - congratulations to the creators